CVE-2019-3870: Fedoraproject Fedora

Medium severity, CVSS 6.1. EPSS: 0.6% chance of exploitation in the next 30 days.

A vulnerability was found in Samba from version (including) 4.9 to versions before 4.9.6 and 4.10.2. During the creation of a new Samba AD DC, files are created in a private subdirectory of the install location. This directory is typically mode 0700, that is owner (root) only access. However in some upgraded installations it will have other permissions, such as 0755, because this was the default before Samba 4.8. Within this directory, files are created with mode 0666, which is world-writable, including a sample krb5.conf, and the list of DNS names and servicePrincipalName values to update.

Affected products

• Fedoraproject Fedora: version 29 only; version 30 only
• Samba Samba: from 4.9.0, before 4.9.6 (fixed in 4.9.6); from 4.10.0, before 4.10.2 (fixed in 4.10.2)
• Synology Directory Server: affected versions not specified
• Synology Diskstation Manager: version 5.2 only; version 6.1 only; version 6.2 only
• Synology Router Manager: version 1.2 only
• Synology Skynas Firmware: affected versions not specified
• Synology VS960HD Firmware: before 2.3.6-1720 (fixed in 2.3.6-1720)

Published 2019-04-09. Last modified 2026-06-17.